Simple tripod mounting head for cheap, light (and flimsy) tripod Hama Star 05 (https://pl.hama.com/000041050000/hama-statyw-star-05?bySearch=star%2005). I wouldnt recommend it for any kind of still photography nor videofilming, but for 360 photography is perfect. More correct, it is perfect after a little upgrade.
Replacing (even more flimsy then the rest) mounting head with my Tripod Static Head gives you light, simple and quite robust tool (especially for outdoor sesions). For 360 photography you dont need handle nor articulation (which you can have with another GoPro mount on top), and will appreciate small footprint. You need of course 1/4 in screw for camera or selfie stick attachment (for length extension).